Device for simultaneously making pulp,cleaning and screening paper



Oct 23,A 1969 TADAsH'i KoBAYAsl-n 3,474,972

DEVICE FOR SIMULTANEOUSLY MAKING PULP, CLEANING AND SCREENING PAPER Filed June 2. 1966 FIG.

TWA/gave' W ww@ United States Patent O U.S. Cl. 241-61 2 Claims ABSTRACT OF THE DISCLOSURE Paper making apparatus beating horizontally, traveling raw stock with a horizontal feed pipe connected to a spherical chamber having a vertically rotating disc with blades on the chamber side opposite the fed pipe. Foreign matter is removed from a bottom section towards the input side. The outlet is on the lower side of the chamber opposite the input side. Around the beating disc are screens and ow channels guiding the stock past the screens to the outlet. Under the bottom section is a conical stock cleaner with coarse stock discharge means to recirculate coarse stock. Water is injected tangentially at the bottom of the chamber.

The present invention relates to a device capable of simultaneously beating and making pulp of raw stock or used paper, while eliminating foreign matter contained therein, and screening the rened stock.

Heretofore, the process of preparing paper stock has consisted of at least three separate stages, beating the raw material including used paper, removing foreign matter contained therein, and finally screening the rened stock. These three stages were placed to form a ow line. This process has a number of disadvantages, such as the fact that the equipment is very large in size and takes up much space for installation, a great deal of power must be used to drive the three stages separately if they are operated by electric motors, and much labor is required to operate and maintain the separate stages.

It is an object of the present invention to provide a device free of these disadvantages and more economical than the conventional type of equipment in installation space, power consumption, and labor requirement for operation and maintenance.

To illustrate the invention, a preferred embodiment thereof is described below in conjunction with the accompanying drawing in which:

FIGURE 1 is a side view of a device of the present invention showing its internal structure, with a vertical section taken through its main components;

FIGURE 2 shows the arrangement used for beating into a pulp and a pulping disk mounted inside the device; and

FIGURE 3 presents a side view of the device coupled to a motor.

In the drawing, there is a box 1 which is generally spherical in shape except for its front input part 2 which is curved inward toward the horizontal axis X-X, giving the box a heart-shaped section. In front of the curved part, along the horizontal axis X-X, is a stock pipe 3, the end of which opens into the box 1.

Within the box is a beating and pulping disk 4 which is rotatably mounted in the rear of box 1 on the horizontal axis X-X opposite the opening of stock feed pipe 3. Mounted on disk 4 are a number of outwardly slanted blades 5, 6, etc., and a number of guide Vanes 7, 8, etc. are provided at proper intervals on the inside of box 1.

Designated as 9 and 9 are flow channels provided behind box 1, separated from the inside of the box by screens 10 and 11. The flow channels 9 and 9 lead to a center port 12, and the lower channel 9 also leads rice to an outlet section 13 on the box output side. A stock cleaner assembly 14, provided below the box 1 toward its front, consists of a top followed downward by a conical vessel 15, narrowing downward, a transparent glass cone 15', and a cock 16, with a discharge port at the end.

Penetrating into the top of the cleaner assembly 14 from one side is a coarse stock discharge pipe 17, the end 17 of which opens downward into the upper part of the conical vessel 15. Also, at the top of the cleaner assembly 14, a fresh water injection pipe 18 is installed tangentially to the inside of the boX. The machine sits on a base 19, on which there is a bearing assembly 20. The tip of this bearing assembly 20 is such that the base 19 support box 1. The bearing 20 supports a spindle 21 of disk 4 and directly couples the spindle with a motor 22 mounted on the base 19.

The machine operates in the following manner:

The disk 4 is turned at a high speed by the motor 22, and material pulp or used paper is supplied through the feed pipe 3 into the box 1. The stock hits the disk 4 and is whirled by its blades 5, 6, etc. Centrifugal force causes the stock to run along the guide vanes 7, 8, etc. toward the front of the box 1, where it is swung along the curved surface 2 and back to the center to be thrown again onto the disk until the stock is sufficiently beaten and pulped. Fresh water from the injection pipe 18 rushes round along the inside of the cleaner assembly 14, and its centrifugal force makes the stock whirl as it comes into the cleaner assembly 14 via the guide vane 8. Foreign matter greater in specic gravity than the stock, such as metal pieces and sand, is separated and goes down the conical vessel 15 and the glass cone 15 to be discharged through the cock 16, While coarse stock is lifted by a pressure difference up the center of the conical vessel 15 and out through the discharge pipe 17 to be recycled via a proper means into the box 1.

Thus, stock in the box 1 is simultaneously beaten, made into pulp and cleaned of foreign matter; then it passes the screens 10 and 11. Part of the screened stock is led through the channel 9 to the center port 12 while the rest passes the channel 9 and goes out through the outlet 13, to be sent to the next manufacturing stage.

The conventional type of equipment for stock preparation, consisting of a pulper for beating the material into pulp, a cleaner for removing foreign matter, and a screening means for rening the stock, all installed separately and connected in a series to form a flow line, has a number of disadvantages, such as the fact that the equipment becomes considerable in `size and takes up much space for installation, a great deal of power must be used to drive the three stages separately if they are operated by electric motors, and much labor is required to operate and maintain the separate stages. The present invention, on the other hand, makes the whole equipment much smaller because stock can be beaten, cleaned of foreign matter, and screened in a single machine, which consequently takes up little space for installation and needs less power and labor, or roughly a third of what the conventional equipment requires.

Although the present invention has been described in conjunction with preferred embodiments, it is to be understood that modifications and variations may be resorted to without departing from the spirit and scope of the invention, as those skilled in the art will readily understand. Such modifications and variations are considered to be within the purview and scope of the invention and appended claims.

I claim:

1. A paper-making apparatus for beating raw stock material into a pulp comprising in combination:

(a) a generally spherically shaped inner wall acting as a treating box including an inwardly curved input 3 4 side with a horizontally disposed raw stock feed pipe (e) injection means disposed substantially tangential coupled to the center of said input side, a bottom to said treating box at the bottom thereof for supsection towards said input side through which foreign plying liquid to said conical vessel and said box. matter will be removed, an outlet section on the 2. An apparatus as claimed in claim 1, said disc being lower side of the box opposite said input side said slightly conically shaped so that the blades thereon are raw stock generally traveling horizontally through 5 outwardly slanted. said treating box; (b) a beating disc mounted in said treating box for References Cited rotation about a horizontal axis, opposite said input UNITED STATES PATENTS side and over said outlet section including blades mounted on the disc, drive means connected to said 2654294 10/1953 Morden 241-256 i 2,682,810 7/1954 Jones 24l-46.17 X d150 to me the dsc 2 969 927 1/1961 v h 241 4617 (c) screens around said beating disc disposed along .aus er 2,973,153 2/1961 Rich 241-46.17 at least a portion of said spherically shaped inner 3 119 570 1/1964 Sandison 241-4617 X wall, How channels disposed outward of said screens 3307791 3/1967 .Nagai 241 74 communicating With said outlet section;

(d) alstock cleaner assembly with a downwardly nai'- ROBERT C RIORDON Primary Examiner rowing conical section coupled to said bottoni section under said bottom section, including a discharge D- G- KELLY, Assistant EXamnGr port, a coarse stock discharge means at the uper part of said conical vessel for receiving stock too U-S- CL XR- coarse to pass through said screens and direct said coarse stock into a recirculation channel; and, 

